Can't seem to relay my email via postfix. I followed your tutorial and it does not work. Here is what I get back (I x'ed the actual email address):
2020-11-18 16:06:41.434423-0500 0x8cfcd Info 0x0 59305 0 smtp: BFBC23FE8080: to=<xxxx@xxx.org>, relay=relay.dynu.com[168.235.95.80]:587, delay=0.65, delays=0/0/0.49/0.16, dsn=5.0.0, status=bounced (host relay.dynu.com[168.235.95.80] said: 530 SMTP authentication is required. (in reply to RCPT TO command))

Any thoughts?

Thanks

Hi,

Did you get an answer to this question? I'm having the same issue and can't seem to find a solution.